Influence of the synthesis on HDS activity of molybdenum phosphide catalysts

Molybdenum phosphide catalyst was prepared via temperature-programmed reduction method, and the hydrodesulfurization catalytic activity was evaluated at atmosphere pressure with thiophene as model compound. Effects of preparation conditions, such as reduction temperature, P/Mo mol ratio and phosphor source on hydrodesulfurization activity were also investigated. Results indicate that the activity decreased with the increase of reduction temperature. And there was an optimal P/Mo mol ratio for preparing catalyst with high catalytic activity. MoP can form with different phosphor source, and the bulk structure of MoP catalyst is kept unchanged based XRD analysis in thiophene HDS condition.